Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    21-01-2021 10:15

General

  • Target

    SecuriteInfo.com.BehavesLike.Win32.Generic.tz.13482.exe

  • Size

    1.3MB

  • MD5

    e9b6740e41a0542f4ad328e00acd7afb

  • SHA1

    98b5cb95aa4cbb0c97a772a2d76592a7c3ffc87c

  • SHA256

    aad93ff025a725de6d3746c2e98126105b7a7f126b7340c540e13fa861c9e268

  • SHA512

    51f60dd1907f6eddc5c29260b8c88714792a0083f09745479db4aed5deb188be1e07740fbe2bc467eef4174d06d6c5899f4499ae11f82699d011222a1f1209c1

Score
10/10

Malware Config

Extracted

Family

remcos

C2

grtwyagvbxnzmklopmdhsyuwaszxbyhredsnmko.ydns.eu:2006

Signatures

  • Remcos

    Remcos is a closed-source remote control and surveillance software.

  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 24 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Program crash 2 IoCs
  • Delays execution with timeout.exe 6 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 36 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.BehavesLike.Win32.Generic.tz.13482.exe
    "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.BehavesLike.Win32.Generic.tz.13482.exe"
    1⤵
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:360
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout 1
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:640
      • C:\Windows\SysWOW64\timeout.exe
        timeout 1
        3⤵
        • Delays execution with timeout.exe
        PID:204
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout 1
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1800
      • C:\Windows\SysWOW64\timeout.exe
        timeout 1
        3⤵
        • Delays execution with timeout.exe
        PID:2876
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout 1
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2000
      • C:\Windows\SysWOW64\timeout.exe
        timeout 1
        3⤵
        • Delays execution with timeout.exe
        PID:1376
    • C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.BehavesLike.Win32.Generic.tz.13482.exe
      "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.BehavesLike.Win32.Generic.tz.13482.exe"
      2⤵
      • Adds Run key to start application
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:2120
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3972
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\win.exe"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:2376
          • C:\Users\Admin\AppData\Roaming\win.exe
            C:\Users\Admin\AppData\Roaming\win.exe
            5⤵
            • Executes dropped EXE
            • Suspicious use of NtSetInformationThreadHideFromDebugger
            • Suspicious use of SetThreadContext
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:3292
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\System32\cmd.exe" /c timeout 1
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:1588
              • C:\Windows\SysWOW64\timeout.exe
                timeout 1
                7⤵
                • Delays execution with timeout.exe
                PID:3460
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\System32\cmd.exe" /c timeout 1
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:2116
              • C:\Windows\SysWOW64\timeout.exe
                timeout 1
                7⤵
                • Delays execution with timeout.exe
                PID:592
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\System32\cmd.exe" /c timeout 1
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:2964
              • C:\Windows\SysWOW64\timeout.exe
                timeout 1
                7⤵
                • Delays execution with timeout.exe
                PID:2500
            • C:\Users\Admin\AppData\Roaming\win.exe
              "C:\Users\Admin\AppData\Roaming\win.exe"
              6⤵
              • Executes dropped EXE
              • Adds Run key to start application
              • Suspicious behavior: GetForegroundWindowSpam
              • Suspicious use of SetWindowsHookEx
              PID:2492
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 3292 -s 1552
              6⤵
              • Program crash
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:3352
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 360 -s 1552
      2⤵
      • Program crash
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3952

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

1
T1112

Discovery

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\install.vbs
    MD5

    4a74e626596d6e66b4bbc59ee6848f2d

    SHA1

    047849ac8735ecc0943428c7cd5e00b52eee06ed

    SHA256

    98bd6dc219a7a3e04d3d67bbec9f0b4d4640831a3a6be0a0078b050041088b0e

    SHA512

    1cd943482d0f1ce2ffaf6ee4a82895e4d57c52051bb14bbda0548cf072b4c5cbe719d2cdb549b5ae7c0241dd9c68dd9d1674acd26aed684b8145500079cc5403

  • C:\Users\Admin\AppData\Roaming\win.exe
    MD5

    e9b6740e41a0542f4ad328e00acd7afb

    SHA1

    98b5cb95aa4cbb0c97a772a2d76592a7c3ffc87c

    SHA256

    aad93ff025a725de6d3746c2e98126105b7a7f126b7340c540e13fa861c9e268

    SHA512

    51f60dd1907f6eddc5c29260b8c88714792a0083f09745479db4aed5deb188be1e07740fbe2bc467eef4174d06d6c5899f4499ae11f82699d011222a1f1209c1

  • C:\Users\Admin\AppData\Roaming\win.exe
    MD5

    e9b6740e41a0542f4ad328e00acd7afb

    SHA1

    98b5cb95aa4cbb0c97a772a2d76592a7c3ffc87c

    SHA256

    aad93ff025a725de6d3746c2e98126105b7a7f126b7340c540e13fa861c9e268

    SHA512

    51f60dd1907f6eddc5c29260b8c88714792a0083f09745479db4aed5deb188be1e07740fbe2bc467eef4174d06d6c5899f4499ae11f82699d011222a1f1209c1

  • C:\Users\Admin\AppData\Roaming\win.exe
    MD5

    e9b6740e41a0542f4ad328e00acd7afb

    SHA1

    98b5cb95aa4cbb0c97a772a2d76592a7c3ffc87c

    SHA256

    aad93ff025a725de6d3746c2e98126105b7a7f126b7340c540e13fa861c9e268

    SHA512

    51f60dd1907f6eddc5c29260b8c88714792a0083f09745479db4aed5deb188be1e07740fbe2bc467eef4174d06d6c5899f4499ae11f82699d011222a1f1209c1

  • memory/204-12-0x0000000000000000-mapping.dmp
  • memory/360-7-0x00000000054A0000-0x00000000054A1000-memory.dmp
    Filesize

    4KB

  • memory/360-9-0x0000000005700000-0x0000000005731000-memory.dmp
    Filesize

    196KB

  • memory/360-10-0x0000000005770000-0x0000000005771000-memory.dmp
    Filesize

    4KB

  • memory/360-2-0x0000000073310000-0x00000000739FE000-memory.dmp
    Filesize

    6.9MB

  • memory/360-3-0x0000000000A20000-0x0000000000A21000-memory.dmp
    Filesize

    4KB

  • memory/360-5-0x0000000005360000-0x0000000005361000-memory.dmp
    Filesize

    4KB

  • memory/360-8-0x0000000005470000-0x0000000005471000-memory.dmp
    Filesize

    4KB

  • memory/360-6-0x0000000005900000-0x0000000005901000-memory.dmp
    Filesize

    4KB

  • memory/592-39-0x0000000000000000-mapping.dmp
  • memory/640-11-0x0000000000000000-mapping.dmp
  • memory/1376-16-0x0000000000000000-mapping.dmp
  • memory/1588-35-0x0000000000000000-mapping.dmp
  • memory/1800-13-0x0000000000000000-mapping.dmp
  • memory/2000-15-0x0000000000000000-mapping.dmp
  • memory/2116-38-0x0000000000000000-mapping.dmp
  • memory/2120-22-0x0000000000400000-0x0000000000422000-memory.dmp
    Filesize

    136KB

  • memory/2120-17-0x0000000000400000-0x0000000000422000-memory.dmp
    Filesize

    136KB

  • memory/2120-18-0x0000000000413FA4-mapping.dmp
  • memory/2376-23-0x0000000000000000-mapping.dmp
  • memory/2492-43-0x0000000000413FA4-mapping.dmp
  • memory/2492-45-0x0000000000400000-0x0000000000422000-memory.dmp
    Filesize

    136KB

  • memory/2500-41-0x0000000000000000-mapping.dmp
  • memory/2876-14-0x0000000000000000-mapping.dmp
  • memory/2964-40-0x0000000000000000-mapping.dmp
  • memory/3292-24-0x0000000000000000-mapping.dmp
  • memory/3292-36-0x0000000005320000-0x0000000005321000-memory.dmp
    Filesize

    4KB

  • memory/3292-27-0x0000000073310000-0x00000000739FE000-memory.dmp
    Filesize

    6.9MB

  • memory/3352-46-0x00000000046B0000-0x00000000046B1000-memory.dmp
    Filesize

    4KB

  • memory/3352-47-0x00000000046B0000-0x00000000046B1000-memory.dmp
    Filesize

    4KB

  • memory/3460-37-0x0000000000000000-mapping.dmp
  • memory/3952-20-0x0000000005180000-0x0000000005181000-memory.dmp
    Filesize

    4KB

  • memory/3972-19-0x0000000000000000-mapping.dmp